<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <button id="btn">按钮</button>
</body>
<script>
    const ele = document.getElementById("btn");
    const handler = function (e) {
        console.log('handler')
    };
    ele.addEventListener('click', handler, { once: true });
</script>

</html>